I have nothing to add but I would love to see videos of those 8ft Sparks
please :)
Matt
On Tue, Mar 27, 2018, 5:03 PM Steve White <steve.white1@xxxxxxxxx> wrote:
> I have had my big SGTC running for about 9 months now. Here are the
> salient specs:
>
> * 8.6" x 39" secondary
> * 9" x 30" top load
> * 45 nF of primary circuit capacitance
> * RSG with 4 rotating electrodes and 2 stationary electrodes, 3600 RPM,
> 240 breaks per second (4 per 60 Hz cycle at 0, 90, 180, and 270 degrees)
> * Pole pig as power source
> * 4800 watt wall power
> * Maximum spark length is about 8 feet
>
> I also built an electrical phase shifter, as others have, based on a
> variac and capacitors. I confirmed with my oscilloscope and an optical
> sensor that I can get about 0 to 90 degrees of phase shift by turning the
> variac knob. Before I added the phase shifter, I used an optical sensor and
> oscilloscope to accurately set the firing points at 0, 90, 180, and 270
> degrees of each 60 Hz cycle.
>
> My question concerns the apparent non-effect of the phase shifter on spark
> length. With the coil running, as I adjust the phase shift, I see no
> apparent change in the spark length. Does anyone have any thoughts as to
> why this would be? I am perfectly satisfied with the coil's performance, I
> just can't explain the apparent non-effect of the phase shifter.
>
> Steve
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